Flexural weakening-shear strengthening (FWSS) technique for the seismic retrofit of RC frames: Experimental study

X. F. Nie, S. S. Zhang, J. G. Teng, G. M. Chen

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review


The strong column-weak beam hierarchy has been widely accepted in the design of reinforced concrete (RC) frames for good seismic performance. In many existing RC frames designed according to previous codes, however, such a hierarchy was not enforced. To rectify this deficiency, a novel seismic retrofit method based on the flexural weakening-shear strengthening (FWSS) concept was proposed by the authors’ group for such frames. To verify the effectiveness of the FWSS technique, an experimental study comprising 8 full-scale RC beams with a web opening was carried out. The test results show that the proposed technique can substantially reduce the flexural capacity of the beam and in the meantime ensure a ductile beam response. More specifically, a web opening of appropriate size can effectively reduce the flexural capacity of a T-section beam, and FRP shear strengthening to avoid shear failure ensures a ductile response.

Original languageEnglish
Publication statusPublished - 1 Jan 2017
Event6th Asia-Pacific Conference on FRP in Structures, APFIS 2017 - Singapore, Singapore
Duration: 19 Jul 201721 Jul 2017


Conference6th Asia-Pacific Conference on FRP in Structures, APFIS 2017


  • Beam opening
  • FRP strengthening
  • Seismic retrofit
  • Strong column-weak beam hierarchy

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

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